EP0903940A1 - Aufnahme- und wiedergabevorrichtung - Google Patents

Aufnahme- und wiedergabevorrichtung Download PDF

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Publication number
EP0903940A1
EP0903940A1 EP97924301A EP97924301A EP0903940A1 EP 0903940 A1 EP0903940 A1 EP 0903940A1 EP 97924301 A EP97924301 A EP 97924301A EP 97924301 A EP97924301 A EP 97924301A EP 0903940 A1 EP0903940 A1 EP 0903940A1
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EP
European Patent Office
Prior art keywords
information
data
recording
region
recorded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97924301A
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English (en)
French (fr)
Other versions
EP0903940A4 (de
Inventor
Masazumi Yamada
Akira Iketani
Yoshinori Kitamura
Yousuke Mizukawa
Yukio Kurano
Tatsuro Juri
Chiyoko Matsumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP14140396A external-priority patent/JP3514038B2/ja
Priority claimed from JP20337196A external-priority patent/JPH1050031A/ja
Priority claimed from JP8208299A external-priority patent/JPH1049412A/ja
Priority claimed from JP06765397A external-priority patent/JP3293514B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0903940A1 publication Critical patent/EP0903940A1/de
Publication of EP0903940A4 publication Critical patent/EP0903940A4/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1201—Formatting, e.g. arrangement of data block or words on the record carriers on tapes
    • G11B20/1207—Formatting, e.g. arrangement of data block or words on the record carriers on tapes with transverse tracks only
    • G11B20/1208—Formatting, e.g. arrangement of data block or words on the record carriers on tapes with transverse tracks only for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1201—Formatting, e.g. arrangement of data block or words on the record carriers on tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/107—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/327—Table of contents
    • G11B27/328—Table of contents on a tape [TTOC]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/327—Table of contents
    • G11B27/329—Table of contents on a disc [VTOC]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation
    • H04N5/9261—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation involving data reduction
    • H04N5/9264—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation involving data reduction using transform coding
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/60—Solid state media
    • G11B2220/65—Solid state media wherein solid state memory is used for storing indexing information or metadata
    • G11B2220/652—Solid state media wherein solid state memory is used for storing indexing information or metadata said memory being attached to the recording medium
    • G11B2220/655—Memory in cassette [MIC]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/9201—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal

Definitions

  • the present invention relates to a recording/reproducing apparatus which records and reproduces an image, a sound, and computer data on and from a recording medium such as a magnetic tape.
  • a currently-used recording cassette for a DVC incorporates a memory which is called an MIC (Memory In Cassette).
  • Cassette and tape management information such as an identification number of a recording cassette (cassette ID), and the length of the tape in the cassette is recorded in MIC.
  • the type of a video signal recorded in an auxiliary recording region of the tape, and the like are recorded in the MIC.
  • a video packet has a format shown in Fig. 2.
  • a packet accommodates DCT (Discrete Cosine Transform) code data of six small blocks.
  • a DC component is disposed at a fixed position such as shown in Fig. 2(a).
  • the data is disposed at a fixed position such as shown in Fig. 2(b).
  • a currently-used digital VTR can record only a video signal and an audio signal which are of a predetermined format.
  • recording media for example, an 8-mm tape and a DAT tape have a special streamer format for recording PC file data.
  • a tape on which recording has been conducted in the streamer mode is different in format from an 8-mm tape, a DAT tape, and the like which are currently used. Therefore, such a system has a defect that there arise problems such as that, when such a tape on which recording has been conducted in the streamer mode is mounted onto an 8-mm or DAT deck, the tape is erroneously recognized and noises are generated.
  • An MIC records only cassette and tape management information, such as a cassette ID and the type of a video signal. In other words, in the case where a DVC is used as a file streamer for a computer, an MIC is not used for recording management information of each recorded file.
  • a tape on which a data file is recorded is enabled to be seen on a currently-used digital VTR deck without problems.
  • the first invention is a recording/reproducing apparatus which records and reproduces a digital video and audio coded signal of a predetermined format on a recording medium in the unit of a predetermined record packet, and in which, in the digital video and audio coded signal, a code word of a DC component of each small block constituting a screen exists at a fixed position in a record packet, wherein
  • the second invention is a recording/reproducing apparatus which records and reproduces a digital video and audio coded signal of a predetermined format on a recording medium in the unit of a predetermined record packet, and in which, in the digital video and audio coded signal, a DC component of each small block constituting a screen, class information defining a quantization method of the small block, and motion information relating to a movement of the small block from a previous screen respectively exist at fixed positions in a record packet, wherein
  • the third invention is a conversion method of converting an input data into a format of a digital video and audio coded signal, in the unit of a predetermined record packet, in which a code word of a DC component of each small block constituting a screen exists at a fixed position in the record packet, wherein
  • the fourth invention is a conversion method of converting an input data into a format of a digital video and audio coded signal, in the unit of a predetermined transmission packet, in which a DC component of each small block constituting a screen, class information, and motion information respectively exist at fixed positions in the transmission packet, wherein
  • the position of a code word of a DC component indicating the starting position of each small block is fixed, and that, when an end-of-block code is added, a region from the added position to the starting position of the next small block becomes a data region which is ineffective for decoding and reproduction in a currently-used digital VTR, it is possible to record a data file other than a video and audio coded signal of the predetermined format.
  • data on a recording medium are identical with transmission and record formats of the recording medium. A data file portion is judged as an ineffective data region, and skipped by a reproducing/decoding device of the currently-used digital VTR deck.
  • the tape on which a data file is recorded can be seen also on a currently-used digital VTR deck without problems.
  • the fifth invention is a conversion method in which a digital video and audio coded signal in the unit of a predetermined record packet is received, a code word of a DC component of each small block constituting a screen respectively existing at a fixed position in the record packet, wherein
  • the sixth invention is a conversion method in which a digital video and audio coded signal in the unit of a predetermined transmission packet is received, the signal having a format in which a code word of a DC component of each small block constituting a screen, class information, and motion information respectively exist at fixed positions in the transmission packet, wherein
  • the fifth invention by using characteristics that the position of a code word of a DC component indicating the starting position of each small block is fixed, and that, when an end-of-block code is added, a region from the added position to the starting position of the next small block becomes a data region which is ineffective for decoding and reproduction in a currently-used digital VTR, it is possible to output a data file from a reproduced signal from a recording medium on which the data file other than a video and audio coded signal of the predetermined format is recorded by the first or third invention.
  • a data file can be reproduced by using regions for class information and motion information in addition to the end-of-block code.
  • the seventh invention is a recording/reproducing apparatus which records and reproduces a digital video and audio coded signal of a predetermined format in the unit of a predetermined record packet, and
  • the eighth invention is a recording/reproducing apparatus which records and reproduces a digital video and audio coded signal of a predetermined format in the unit of a predetermined record packet, and
  • the ninth invention is a conversion method of converting an input data into a format of a digital video and audio coded signal, in the unit of a predetermined transmission packet, in which a code word of a DC component of each small block constituting a screen exists at a fixed position in the transmission packet, wherein
  • the tenth invention is a conversion method of converting an input data into a format of a digital video and audio coded signal, in the unit of a predetermined transmission packet, in which a DC component of each small block constituting a screen, class information, and motion information respectively exist at fixed positions in the transmission packet, wherein
  • the eleventh invention is a conversion method of converting an input data into a format of a digital video and audio coded signal, in the unit of a predetermined transmission packet, in which a code word of a DC component of each small block constituting a screen exists at a fixed position in the transmission packet, wherein
  • the twelfth invention is a conversion method in which a digital video and audio coded signal in the unit of a predetermined transmission packet is received, in which a code word of a DC component of each small block constituting a screen exists at a fixed position in the transmission packet, wherein
  • the thirteenth invention is a conversion method in which a digital video and audio coded signal in the unit of a predetermined transmission packet is received, in which a DC component of each small block constituting a screen, class information, and motion information respectively exist at fixed positions in a record packet, wherein
  • a region is set in the same manner as a region which is disposed for recording a data file, and management information of each file, such as the name of the file, the time and date of updation of the file, information of the file start position, the file size, information of the file end position, or information of the number of tracks is recorded.
  • management information of each file such as the name of the file, the time and date of updation of the file, information of the file start position, the file size, information of the file end position, or information of the number of tracks is recorded.
  • the file is not restricted to data files.
  • the file start position, the file end position, or the number of tracks is decided as a one file unit, and the file name, the time and date of updation, and the like are added to data of a currently-used digital VTR, the data can be handled in the same manner as a data file.
  • the fourteenth invention comprises data recording means for recording file management information which is information for managing a file to be recorded into a recording medium other than a recording medium (a magnetic tape), to the magnetic tape recording medium.
  • file management information is information for managing a file to be recorded into a recording medium other than a recording medium (a magnetic tape), to the magnetic tape recording medium.
  • management information of each file which is to be recorded on a tape can be recorded into an MIC which is conventionally used only for recording management information of a tape and a cassette. Therefore, an access to a file recorded on a tape is facilitated as compared with the prior art.
  • the fifteenth invention is a recording/reproducing method in which; on an individualizing information storage medium (an MIC) added to a recording medium (a magnetic tape), individualizing information for distinguishing the tape from other tapes is stored; content information relating to data contents on the tape is stored in content information storing means (a hard disk on a PC/deck); during a process of reproducing the tape, the content information of the tape identified by the individualizing information is acquired; and data on the tape are reproduced on the basis of the acquired content information.
  • an individualizing information storage medium an MIC
  • a recording medium a magnetic tape
  • content information relating to data contents on the tape is stored in content information storing means (a hard disk on a PC/deck)
  • content information storing means a hard disk on a PC/deck
  • the sixteenth invention is a recording/reproducing method in which; on an MIC added to a tape, individualizing information for distinguishing the tape from other tapes, and data updation information which is information relating to a time and date of updation of data on the tape are stored; content information relating to data contents on the tape and content information updation information relating to a time and date of updation of content information are stored in content information storing means (a hard disk on a PC/deck) disposed in a recording/reproducing apparatus which can reproduce the tape; if, during a process of reproducing the tape, the time and date indicated by the content information updation information is identical with or newer than the time and date indicated by the data updation information, the content information of the tape identified by the individualizing information storing means is acquired; and data on the tape are reproduced on the basis of the acquired content information.
  • content information storing means a hard disk on a PC/deck
  • the seventeenth invention is a recording/reproducing method in which; on an individualizing information storage medium added to a detachable recording medium, individualizing information which is information for distinguishing the recording medium from other recording media of a same type, and data updation information which is information relating to a data on the recording medium are stored; recording medium content information which is information relating to data contents in the recording medium, and recording medium content information updation information which is information relating to a time and date of updation of content information are stored at a predetermined position on the recording medium; content information which is information relating to data contents in the recording medium, and content information updation information which is information relating to a time and date of updation of content information are stored into content information storing means disposed in a recording/reproducing apparatus which can reproduce the recording medium; if, during a process of reproducing the recording medium, the time and date indicated by the content information updation information is identical with or newer than the time and date indicated by the data updation information, the content information of the recording medium identified
  • the eighteenth invention is a recording/reproducing method in which, also when information relating to contents is to be acquired from recording medium content information on a recording medium, and also when information relating to contents is to be acquired from content information on a content information recording means, information relating to contents is displayed to a user by a common method.
  • an MIC, a management information track, and management information on an HDD are always matched to one other unless writing is performed on a tape by using another PC.
  • a file can be immediately accessed by using only management information on the HDD and without reading the management information track.
  • the nineteenth invention is a recording method in which copy control information which is to be added to each sector of a data to be recorded is separately extracted and judged, typical-copy control information is generated in a predetermined range, and the typical-copy control information is recorded at a predetermined position of a recording medium for recording data from which the copy control information is separated.
  • the twentieth invention is a transmitting method in which copy control information which is to be added to each sector of a data to be transmitted is separately extracted and judged, typical-copy control information is generated in a predetermined range, and the typical-copy control information is transmitted together with data from which the copy control information is separated (a predetermined position of a transmission packet/other packets/a specific position in the data).
  • Fig. 1 is a block diagram of an embodiment of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 100 denotes input data judging means
  • 101 denotes DVC data generating means
  • 102 denotes EOB adding means
  • 103 denotes address generating means
  • 104 denotes a switch
  • 105 denotes data format converting means
  • 106 denotes auxiliary information generating means.
  • components denoted by the same reference numeral have the same configuration and function.
  • the input data judging means 100 judges whether data input from the hard disk 11 in the PC 10 are DVC data or not.
  • the judgment is conducted based on whether an extension of the data name or management information added to the data coincides with a predetermined value or not.
  • also conditions of the data which are to be output for example, whether the data correspond to the 25-Mbps mode which is the standard one for a DVC or not, or whether the data correspond to a mode of a low rate or 12.5 Mbps or not is judged by the input data judging means 100. If it is judged as a result of the judgment that the input data are DVC data, the input data are output as they are through the switch 104. In this case, the data are recorded in the format of a DVC packet such as shown in Fig. 2. In this description, a video packet is shown.
  • DCT Discrete Cosine Transform
  • the data are switched by the switch 104 so as to be input into the data format converting means 105.
  • the DVC data generating means 101 connected to the data format converting means 105 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the input data judging means 100 it is judged on the basis of the data rate and the like whether the data are data which are to be recorded in correspondence with the 25-Mbps mode or not, or whether the data are data which are to be recorded in correspondence with the low-rate mode of 12.5 Mbps or not. In accordance with the judgment, the header of a packet and the value in a specific packet are switched to appropriate ones.
  • the address generating means 103 generates an address to which data of each packet can be allocated.
  • Fig. 3(a) shows a method of recording data other than a DVC into video packets of DVC packets of the 25-Mbps mode.
  • DCT Discrete Cosine Transform
  • the EOB adding means 102 adds to the address generated by the address generating means 103, i.e., the address immediately behind the motion component, class information, and the DC component of the small block, an EOB (End-Of-Block) code which indicates the end of the code word of the small block.
  • regions of 12 bytes or 8 bytes from the EOB to the start position of the next small block i.e., 64 bytes in the whole of one DVC block become data regions which are ineffective for decoding and reproducing currently-existing DVC data. Even when any data is allocated to the regions, the data does not affect an image reproduced from the DVC, and a decoded image which is due to only data of DC components is displayed.
  • Fig. 3(b) shows a method of recording data other than a DVC into video packets of DVC packets of the 12.5-Mbps mode.
  • DCT Discrete Cosine Transform
  • the EOB adding means 102 adds to the address generated by the address generating means 103, i.e., the address immediately behind the DC component of the small blocks, an EOB (End-of-Block) code which indicates the end of the code word of the small block.
  • the regions of 8 bytes and 6 bytes from the EOB to the start position of the next small block i.e. 60 bytes in the whole of one DVC block in the same manner as FIG. 3(a) become data regions which are ineffective for decording and reproducing currently exixting DVC data.
  • data are recorded also at positions of recording motion components and class information which are not necessary in data recording other than a DVC.
  • the data format converting means 105 judges whether a combination pattern of the input data and the bits of the DC component coincides with the special pattern or not, and, if the patterns coincide with each other, converts the ninth bit of the DC component.
  • the regions of 8 bytes or 6 bytes from the EOB to the start position of the next small block, and a further 4-bit region of motion information and class information and the ninth bit of the DC component for each small block, i.e., 64 bytes in the whole of one DVC block in the same manner as Fig. 3(a) become data regions which are ineffective for decoding and reproducing currently-existing DVC data. Even when any data is allocated to the regions, the data does not affect an image reproduced from the DVC, and a decoded image which is due to only data of DC components is displayed.
  • the data which have undergone the above-mentioned conversion are recorded into the cassette by the record/reproduction processing circuit 6.
  • a process such as double writing of data may be performed.
  • the data rate is reduced to 1/2.
  • Fig. 4 is a block diagram of Embodiment 2 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 100 denotes input data judging means
  • 101 denotes DVC data generating means
  • 102 denotes EOB adding means
  • 103 denotes address generating means
  • 104 denotes a switch
  • 105 denotes data format converting means
  • 106 denotes auxiliary information generating means
  • 108 denotes data kind code generating means.
  • the input data judging means 100 judges whether data input from the hard disk 11 in the PC 10 are DVC data or not. If it is judged as a result of the judgment that the input data are DVC data, the input data are output as they are through the switch 104. In this case, the data are recorded in the format of a DVC packet such as shown in Fig. 2. In the case where the input data are not DVC data, the data are switched by the switch 104 so as to be input into the data format converting means 105, and then converted into the format shown in Fig. 3.
  • the DVC data generating means 101 connected to the data format converting means 105 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the address generating means 103 generates addresses to which data of the packets can be allocated.
  • data other than a DVC are recorded into a DVC packet in the format of Fig. 3(a) in the case of the 25-Mbps mode, and in the format of Fig. 3(b) in the case of the 12.5-Mbps mode.
  • the data kind code generating means 108 On the basis of an input from the input data judging means 100, the data kind code generating means 108 generates a flag indicating whether the recorded data are those obtained by recording DVC data as they are or not, and a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording.
  • the flags are added together with other auxiliary information generated by the auxiliary information generating means 106, to the input data.
  • the flags are recorded also thereinto.
  • the data which have undergone the above-mentioned conversion are recorded into the cassette 3 by the record/reproduction processing circuit 6.
  • the embodiment has both the recording function of a currently-used digital VTR deck, and the function of recording data other than digital VTR data. At the same time as the switching, also information indicative of the format in which the recording is performed is recorded. Therefore, it is possible to record both a data file and data of a currently-used digital VTR without problems.
  • a process such as double writing of data may be performed.
  • the data rate is reduced to 1/2.
  • Fig. 5 is a block diagram of Embodiment 3 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 100 denotes input data judging means
  • 101 denotes DVC data generating means
  • 102 denotes EOB adding means
  • 103 denotes address generating means
  • 104 denotes a switch
  • 105 denotes data format converting means
  • 106 denotes auxiliary information generating means
  • 109 denotes data amount information generating means
  • 111 denotes ineffective data generating means
  • 110 denotes data amount measuring means.
  • the input data judging means 100 judges whether data input from the hard disk 11 in the PC 10 are DVC data or not. If it is judged as a result of the judgment that the input data are DVC data, the input data are output as they are through the switch 104. In this case, the data are recorded in the format of a DVC packet such as shown in Fig. 2.
  • the data are switched by the switch 104 so as to be input into the data format converting means 105, and then converted into the format shown in Fig. 3.
  • the DVC data generating means 101 connected to the data format converting means 105 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the address generating means 103 generates addresses to which data of the packets can be allocated.
  • data other than a DVC are recorded into a DVC packet in the format of Fig. 3(a) in the case of the 25-Mbps mode, and in the format of Fig. 3(b) in the case of the 12.5-Mbps mode.
  • the data which have undergone the above-mentioned conversion are recorded into the cassette 3 by the record/reproduction processing circuit 6.
  • the data are recorded on a tape in the format such as shown in Fig. 6.
  • the rate of recording data on a tape is constant.
  • the data amount measuring means 110 measures the amount of data which are input during a period corresponding to one track, i.e., 1/299.7 sec.
  • the measurement amount of the data amount measuring means 110 is generated as a flag by the data amount information generating means 109 and then recorded with being multiplexed to an input signal. In the case where the cassette 3 has the MIC 2 serving as an external storage device, the flag is recorded also thereinto.
  • the data file when the size of an input data file is not an integer multiple of the size of the region where the data recording is enabled, i.e., the data region which is ineffective for decoding and reproduction in a currently-used digital VTR, or when the input data rate is different from the recording rate of a currently-used deck in spite of conversion and recording conducted so as to maintain the real-timeness, the data file is recorded with adding ineffective dummy data. In a reproducing process, the data file can be reproduced while the added ineffective dummy data are removed away.
  • the data rate depends on the amount of ineffective dummy data, and is reduced to 1/2 at the worst.
  • Fig. 7 is a block diagram of Embodiment 4 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 200 denotes input data judging means
  • 201 denotes DVC data generating means
  • 202 denotes EOB adding means
  • 203 denotes address generating means
  • 204 denotes a switch
  • 205 denotes data format converting means
  • 206 denotes auxiliary information generating means.
  • the input data judging means 200 judges whether data input from the hard disk 11 in the PC 10 are DVC data or not. If it is judged as a result of the judgment that the input data are DVC data, the input data are output as they are through the switch 204. In this case, the data are recorded in the format of a DVC packet such as shown in Fig. 2.
  • the data are switched by the switch 204 so as to be input into the data format converting means 205, and then converted into the format shown in Fig. 3.
  • the DVC data generating means 201 connected to the data format converting means 205 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the address generating means 203 generates addresses to which data of the packets can be allocated.
  • data other than a DVC are recorded into a DVC packet in the format of Fig. 3(a) in the case of the 25-Mbps mode, and in the format of Fig. 3(b) in the case of the 12.5-Mbps mode.
  • the data which have undergone the above-mentioned conversion are output to the recording/reproducing apparatus 1, and then recorded into the cassette 3 by the record/reproduction processing circuit 6.
  • a data file is converted into a data format corresponding to the recording function of a currently-used digital VTR deck, thereby allowing the data file to be recorded by the currently-used digital VTR without problems.
  • a process such as double writing of data may be performed.
  • the data rate is reduced to 1/2.
  • Fig. 8 is a block diagram of Embodiment 5 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 200 denotes input data judging means
  • 201 denotes DVC data generating means
  • 202 denotes EOB adding means
  • 203 denotes address generating means
  • 204 denotes a switch
  • 205 denotes data format converting means
  • 206 denotes auxiliary information generating means
  • 208 denotes data kind code generating means.
  • the input data judging means 200 judges whether data input from the hard disk 11 in the PC 10 are DVC data or not. If it is judged as a result of the judgment that the input data are DVC data, the input data are output as they are through the switch 204. In this case, the data are recorded in the format of a DVC packet such as shown in Fig. 2.
  • the data are switched by the switch 204 so as to be input into the data format converting means 205, and then converted into the format shown in Fig. 3.
  • the DVC data generating means 201 connected to the data format converting means 205 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the address generating means 203 generates addresses to which data of the packets can be allocated.
  • data other than a DVC are recorded into a DVC packet in the format of Fig. 3(a) in the case of the 25-Mbps mode, and in the format of Fig. 3(b) in the case of the 12.5-Mbps mode.
  • the data kind code generating means 208 On the basis of an input from the input data judging means 200, the data kind code generating means 208 generates a flag indicating whether the disposed data are those obtained by recording DVC data as they are or not, and a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording. The flags are added together with other auxiliary information generated by the auxiliary information generating means 206, to the input data.
  • the data which have undergone the above-mentioned conversion are output to the recording/reproducing apparatus 1, and then recorded into the cassette 3 by the record/reproduction processing circuit 6.
  • a data file other than a video and audio signal of a predetermined format is converted and then output, thereby enabling the data file to be recorded by a currently-used digital VTR deck.
  • data on a recording medium are identical with transmission and record formats of the recording medium. A data file portion is judged as an ineffective data region, and skipped by a reproducing/decoding device of the currently-used digital VTR deck. Therefore, a tape on which the data file is recorded can be seen also on a currently-used digital VTR deck without problems.
  • the data rate depends on the amount of ineffective dummy data, and is reduced to 1/2 at the worst.
  • Fig. 9 is a block diagram of Embodiment 6 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10B denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces.
  • the input data judging means 200 judges whether data input from the hard disk 11 in the PC 10 are DVC data or not.
  • the input data are DVC data
  • the input data are output as they are through the switch 204.
  • the data are recorded in the format of a DVC packet such as shown in Fig. 2.
  • the data are switched by the switch 104 so as to be input into the data format converting means 205, and then converted into the format shown in Fig. 3.
  • the DVC data generating means 201 connected to the data format converting means 205 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the address generating means 203 generates addresses to which data of the packets can be allocated.
  • data other than a DVC are recorded into a DVC packet in the format of Fig. 3(a) in the case of the 25-Mbps mode, and in the format of Fig. 3(b) in the case of the 12.5-Mbps mode.
  • the data which have undergone the above-mentioned conversion are recorded into the cassette by the record/reproduction processing circuit 6.
  • the data are recorded on a tape in the format such as shown in Fig. 6.
  • the rate of recording data on a tape is constant.
  • the data amount measuring means 110 measures the amount of data which are input during a period corresponding to one track, i.e., 1/299.7 sec.
  • the measurement amount of the data amount measuring means 220 is generated as a flag by data amount information generating means 222 and then recorded with being multiplexed to an input signal.
  • the data file when the size of an input data file is not an integer multiple of the size of the region where the data recording is enabled, i.e., the data region which is ineffective for decoding and reproduction in a currently-used digital VTR, or when the input data rate is different from the recording rate of a currently-used deck in spite of conversion and recording conducted so as to maintain the real-timeness, the data file is recorded with adding ineffective dummy data. In a reproducing process, the data file can be reproduced while the added ineffective dummy data are removed away.
  • the data amount in one track has been considered.
  • this may be set to be in another unit such as ten tracks.
  • the judgment may be conducted by using information recorded therein.
  • Fig. 10 is a block diagram of Embodiment 7 of the invention.
  • 301 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 301 denotes DVC data analyzing means
  • 303 denotes address generating means
  • 305 denotes data format converting means
  • 306 denotes auxiliary information generating means.
  • the input data judging means 100 judges whether data input through the interface 5 are DVC data or not. If it is judged that the input data are not DVC data, the data are converted by the data format converting means 305.
  • the DVC data analyzing means 301 connected to the data format converting means 305 analyzes data patterns of packets in a memory with reference to the track number of the data which is currently output, the packet numbers, and the like, and outputs them to a buffer in a given sequence.
  • the address generating means 302 generates addresses to which data of the packets can be allocated.
  • the auxiliary information generating means 306 obtains, from auxiliary information, a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording of the data, and a flag indicating whether double writing of data is conducted or not, and switches over the operation of the address generating means 303.
  • Data recorded in the 25-Mbps mode have the format of Fig. 3(a), and those recorded in the 12.5-Mbps mode have the format of Fig. 3(b).
  • PC data are output from a data storing region in the format.
  • the embodiment has both the recording function of a currently-used digital VTR deck, and the function of recording data other than digital VTR data. At the same time as the switching, also information indicative of the format in which the recording is performed is recorded. Therefore, it is possible to record both a data file and data of a currently-used digital VTR without problems.
  • the position of a code word of a DC component indicating the starting position of each small block is fixed, and that, when an end-of-block code is added, a region from the added position to the starting position of the next small block becomes a data region which is ineffective for decoding and reproduction in a currently-used digital VTR, it is possible to reproduce, from a recording medium on which a data file other than a video and audio signal of a predetermined format is recorded, the data file.
  • the judgment may be conducted by using information recorded therein.
  • Fig. 11 is a block diagram of Embodiment 8 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 300 denotes input data judging means
  • 301 denotes DVC data analyzing means
  • 303 denotes address generating means
  • 304 denotes a switch
  • 305 denotes data format converting means
  • 306 denotes auxiliary information generating means.
  • the input data judging means 300 judges whether data input from the hard disk 11 are DVC data or not.
  • the input data are DVC data
  • the input data are output as they are through the switch 304.
  • the data are output in the format of a DVC packet such as shown in Fig. 2.
  • the input data are not DVC data or have the format shown in Fig. 3, the data are switched by the switch 304 so as to be input into the data format converting means 305 and then converted.
  • the DVC data analyzing means 301 connected to the data format converting means 305 analyzes data patterns of packets in a memory with respect to the track number of the data which is currently output, the packet numbers, and the like, and outputs them to a buffer in a given sequence.
  • the address generating means 303 generates addresses to which data of the packets can be allocated.
  • the auxiliary information judging means 306 obtains, from auxiliary information, a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording of the data, and a flag indicating whether double writing of data is conducted or not, and switches over the operation of the address generating means 303.
  • Data recorded in the 25-Mbps mode have the format of Fig. 3(a), and those recorded in the 12.5-Mbps mode have the format of Fig. 3(b).
  • PC data are output from a data storing region in the format.
  • the judgment may be conducted by using information recorded therein.
  • the position of a code word of a DC component indicating the starting position of each small block is fixed, and that, when an end-of-block code is added, a region from the added position to the starting position of the next small block becomes a data region which is ineffective for decoding and reproduction in a currently-used digital VTR, it is possible to reproduce, from a recording medium on which a data file other than a video and audio signal of a predetermined format is recorded, the data file.
  • the function of a reproducing/decoding device of a currently-used digital VTR deck, and also the above-mentioned function are provided and switched over, thereby enabling both a tape on which a data file is recorded, and that on which recording is conducted by a currently-used digital VTR deck, to be seen without problems.
  • Fig. 12 is a block diagram of Embodiment 9 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 300 denotes input data judging means
  • 301 denotes DVC data analyzing means
  • 303 denotes address generating means
  • 304 denotes a switch
  • 305 denotes data format converting means
  • 306 denotes auxiliary information generating means
  • 307 denotes data amount information judging means.
  • the input data judging means 300 judges whether data input from the hard disk 11 are DVC data or not.
  • the input data are DVC data
  • the input data are output as they are through the switch 304.
  • the data are output in the format of a DVC packet such as shown in Fig. 2.
  • the input data are not DVC data or have the format shown in Fig. 3, the data are switched by the switch 304 so as to be input into the data format converting means 305 and then converted.
  • the DVC data analyzing means 301 connected to the data format converting means 305 analyzes data patterns of packets in a memory with respect to the track number of the data which is currently output, the packet numbers, and the like, and outputs them to a buffer in a given sequence.
  • the address generating means 303 generates addresses to which data of the packets can be allocated.
  • the auxiliary information judging means 306 obtains, from auxiliary information, a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording of the data, and a flag indicating whether double writing of data is conducted or not, and switches over the operation of the address generating means 303.
  • Data recorded in the 25-Mbps mode have the format of Fig. 3(a), and those recorded in the 12.5-Mbps mode have the format of Fig. 3(b).
  • PC data are output from a data storing region in the format.
  • the record amount in the 2 kbytes of one track is judged from the data amount information in an input signal. Data subsequent to the judged data amount are set as ineffective data and removed away. Thereafter, an outputting process is performed.
  • the embodiment has both the recording function of a currently-used digital VTR deck, and the function of recording data other than digital VTR data. At the same time as the switching, also information indicative of the format in which the recording is performed is recorded. Therefore, it is possible to record both a data file and data of a currently-used digital VTR without problems.
  • information of the track data amount in each track in an input digital video and audio coded signal is obtained, and only a data amount indicated by the track data amount information is output from a general-purpose data recording region in each track in the digital video and audio coded signal, whereby a data which is input at a variable rate can be correctly reproduced.
  • the data amount in one track has been considered.
  • this may be set to be in another unit such as ten tracks.
  • the judgment may be conducted by using information recorded therein.
  • Fig. 13 is a block diagram of Embodiment 10 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 and 15 denote interfaces
  • 400 denotes input data judging means
  • 101 denotes DVC data generating means
  • 102 denotes EOB adding means
  • 103 denotes address generating means
  • 104 denotes a switch
  • 105 denotes data format converting means
  • 106 denotes auxiliary information generating means
  • 401 denotes file management information generating means
  • 402 denotes file management information position information generating means.
  • the file management information generating means 401 generates management information for handling data recorded in a DVC as a file on the PC 10 and the like. Specifically, a certain given continuous zone on a tape is regarded as a file, and the name of the file, the start position, the size, the time and date of recording, and the like are generated. The generated data are sent to the DVC in the same manner as conventional data, at a timing which is preset in the PC 10, for example, a timing immediately before when a program of connection with a DVC is ended.
  • files are not restricted to data files.
  • the file start position, the file end position, or the track number is determined as one file unit and the name of a file, the time and date of updation, and the like are added, also data of a currently-used digital VTR can be handled in the same manner as a data file.
  • the input data judging means 400 judges whether data input from the hard disk 11 of the PC 10 are DVC data or not, and whether the data are file management information or not. In this case, also conditions of the data which are to be output, for example, whether the data correspond to the 25-Mbps mode which is the standard one for a DVC or not, or whether the data correspond to a mode of a low rate or 12.5 Mbps or not are judged by the input data judging means 100. If it is judged as a result of the judgment that the input data are file management information, the input data are switched over by the switch 104 so as to be input into the data format converting means 105.
  • the DVC data generating means 101 connected to the data format converting means 105 outputs data patterns of packets in a memory, to a buffer in a given sequence. In this case, values which are sequentially changed, such as the track number of the data which is currently output, and the packet numbers are output while being sequentially rewritten by a counter.
  • the address generating means 103 generates addresses to which data of the packets can be allocated.
  • data other than a DVC are recorded into a DVC packet in the format of Fig. 3(a) in the case of the 25-Mbps mode, and in the format of Fig. 3(b) in the case of the 12.5-Mbps mode.
  • the auxiliary information generating means 106 On the basis of an input from the input data judging means 100, the auxiliary information generating means 106 generates a flag indicating whether the recorded data are those obtained by recording DVC data as they are or not, a flag indicating file management information, and a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording, and adds the flags to the input data.
  • the file management information position information generating means 402 generates information relating to the record position of file management information on a tape, and multiplexes it into an input signal. This may be recorded at the head of a tape or at a specific position such as that on the MIC 2, or written into all tracks in which file management information is recorded, or as auxiliary information indicating that the tracks are those in which file management information is recorded.
  • the data which have undergone the above-mentioned conversion are recorded into the cassette 3 by the record/reproduction processing circuit 6.
  • a region is set in the same manner as that which is disposed for recording a data file, and management information of each file, such as the name of the file, the time and date of updation of the file, information of the file start position, the file size, information of the file end position, or information of the number of tracks is recorded.
  • management information of each file such as the name of the file, the time and date of updation of the file, information of the file start position, the file size, information of the file end position, or information of the number of tracks is recorded.
  • Fig. 14 is a block diagram of Embodiment 11 of the invention.
  • 1 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 6 denotes a record/reproduction processing circuit
  • 10 denotes a personal computer (PC)
  • 11 denotes a hard disk
  • 13 denotes a CPU
  • 14 denotes a memory
  • 5 denotes an interface
  • 500 denotes input data judging means
  • 301 denotes DVC data analyzing means
  • 303 denotes address generating means
  • 504 denotes a switch
  • 505 denotes data format converting means
  • 506 denotes auxiliary information judging means.
  • the input data judging means 500 judges whether data input from the interface 5 are DVC data or not, and whether the data are file management information or not. If it is judged as a result of the judgment that the input data are DVC data, the input data are output as they are through the switch 504. In this case, the data are output in the format of a DVC packet such as shown in Fig. 2.
  • the input data are not DVC data or have the format shown in Fig. 3, the data are switched by the switch 504 so as to be input into the data format converting means 505 and then converted.
  • a controller 507 judges the record position of the file management information on a tape, and controls the tape so as to run to the position.
  • File management information position information on the tape or the MIC 2 may be read out, or auxiliary information indicating that the track records file management information may be read.
  • the DVC data analyzing means 301 connected to the data format converting means 505 analyzes data patterns of packets in a memory with respect to the track number of the data which is currently output, the packet numbers, and the like, and outputs them to a buffer in a given sequence.
  • the address generating means 303 generates addresses to which data of the packets can be allocated.
  • the auxiliary information judging means 506 obtains, from auxiliary information, a flag indicating which one of the 25-Mbps mode and the 12.5-Mbps mode is used in the recording of the data, and a flag indicating whether double writing of data is conducted or not, and switches over the operation of the address generating means 303.
  • Data recorded in the 25-Mbps mode have the format of Fig. 3(a), and those recorded in the 12.5-Mbps mode have the format of Fig. 3(b).
  • PC data are output from a data storing region in the format.
  • the judgment may be conducted by using information recorded therein.
  • a region is set in the same manner as that which is disposed for recording a data file, and management information of each file, such as the name of the file, the time and date of updation of the file, information of the file start position, the file size, information of the file end position, or information of the number of tracks is recorded.
  • management information of each file such as the name of the file, the time and date of updation of the file, information of the file start position, the file size, information of the file end position, or information of the number of tracks is recorded.
  • Fig. 15 is a block diagram of Embodiment 12 of the invention.
  • 602 denotes file management information fetching means
  • 2 denotes an MIC.
  • tape management information fetching means 601 When an unused cassette is set in a recording/reproducing apparatus, tape management information fetching means 601 generates a cassette ID which is an identification of the cassette, and the cassette ID is recorded in the MIC 2. In the case where a cassette which is to be input into the recording/reproducing apparatus is a currently-used cassette, a cassette ID is read out from the cassette by the tape management information fetching means 601. Data transmitted from an external apparatus are input into data inputting means 610. The data input from the data inputting means 610 are sent to the file management information fetching means 602, the tape management information fetching means 601, and a cassette 3. The tape management information fetching means 601 fetches auxiliary information such as the type of a video signal of the input data.
  • the file management information fetching means 602 fetches, for each file, information of the file recorded on a tape, that is, the name of the file, the time and date of recording on the tape, the size of the file, copyright information of the file, copy control information of the file, and the readout position of the file in the tape.
  • the file management information fetching means 602 fetches data in which a volume, a partition, a directory, and a descriptor for managing files that are specified in 13346 are recorded.
  • the information fetched by the file management information fetching means 602 and the tape management information fetching means 601 is recorded into the MIC 2.
  • the data fetched from the data inputting means 610 and the tape management information fetching means 601 are recorded into the cassette.
  • the tape management information and file management information recorded in the MIC 2 may be recorded only in the MIC 2, or alternatively part or the whole of the information recorded in the MIC 2 may be recorded in the cassette.
  • auxiliary information relating to the tape such as the cassette ID and the video signal type
  • information relating to files and recorded in the tape is read out from the MIC 2, and data are reproduced from the magnetic tape in accordance with the readout information.
  • the reproduced data are sent to data outputting means 612, and then output to the outside from the data outputting means 612.
  • management information of file data to be recorded in the DVC is recorded in the MIC which, in the prior art, is used for recording only management information of a tape and a cassette, thereby enabling also management information of files to be recorded in a tape, to be recorded. Therefore, an access to a file recorded in the tape is easily performed as compared with the prior art.
  • management information of a file to be recorded in the MIC is input from a magnetic tape.
  • file management information may be obtained from an external apparatus from which an output operation to the data inputting means 610 is to be performed, or another external apparatus.
  • an embodiment will be described in (Embodiment 13).
  • Fig. 16 is a block diagram of Embodiment 13 of the invention.
  • 603 denotes file management information fetching means
  • 25 denotes an external apparatus.
  • components denoted by the same reference numeral have the same configuration and function.
  • the operation of the thus configured recording/reproducing apparatus will be described.
  • the file management information fetching means 603 receives from the external apparatus 25, for each file, information of the file recorded on a tape, that is, the name of the file, the time and date of recording on the tape, the size of the file, copyright information of the file, and copy control information of the file.
  • the information fetched by the file management information fetching means 603 and the tape management information fetching means 601 is recorded into the MIC 2.
  • management information of file data to be recorded in the DVC is recorded in the MIC which, in the prior art, is used for recording only management information of a tape and a cassette, thereby enabling also management information of each file to be recorded in a tape, to be recorded. Therefore, an access to a file recorded in the tape is easily performed as compared with the prior art.
  • Fig. 17 is a block diagram of Embodiment 14 of the invention.
  • 701 denotes a recording/reproducing apparatus
  • 3 denotes a cassette
  • 2 denotes an MIC
  • 705 denotes data inputting means
  • 706 denotes data outputting means
  • 710 denotes a personal computer (PC)
  • 711 denotes a hard disk
  • 712 and 715 denote cassette information acquiring means
  • 713 and 716 denote cassette information generating means
  • 714 denotes cassette information comparing means
  • 708 and 715 denote file management information acquiring means
  • 709 and 716 denote file management information generating means
  • 717 denotes a CPU
  • 718 denotes a memory
  • 707 and 719 denote interfaces.
  • the tape management information fetching means 713 When an unused cassette is set in the recording/reproducing apparatus 701, it is possible to judge that the cassette is unused, from information obtained from the cassette information acquiring means 712, or a reproduced signal of a tape.
  • the tape management information fetching means 713 generates a cassette ID which is an identification of the cassette, and the cassette ID is recorded in the MIC 2.
  • a cassette ID is read out from the MIC 2 of the cassette by the cassette information acquiring means 712.
  • Data which are transmitted from an external apparatus through the interface 5 are input into the data inputting means 705.
  • the data input from the data inputting means 705 are sent to the file management information generating means 709 and the cassette 3.
  • auxiliary information such as the type of a video signal of the input data is fetched, and stored together with newly added auxiliary information such as a designated file name, into the MIC 2.
  • the auxiliary information is sent to the cassette 3 and the PC 710, and then recorded in recording regions of the hard disk 711 and the memory 718.
  • the time and data of updation of the hard disk 711 are stored into the memory 718, and updatingly recorded into the hard disk 711 and the MIC 2.
  • the auxiliary information is recorded into an auxiliary information recording region of a magnetic tape 721 in the cassette 3.
  • the time and date when the cassette is unloaded are recorded into the auxiliary information recording region of the tape, the MIC 2, and the hard disk 711.
  • identification information such as the cassette ID and the time and date information is read out from the MIC 2.
  • the readout identification information is compared with corresponding one on the hard disk 711. If it is judged from the cassette ID or the like that the cassette is identical with that the management information of which is recorded on the hard disk 711, comparison on the time and date of updation of the management information is conducted. When the times and dates of updation coincide with each other, auxiliary information of the hard disk 711 is read out and then stored into the memory 718, and files in the cassette 3 are managed by using the stored auxiliary information. In accordance with the auxiliary information, data are reproduced from the magnetic tape 721.
  • a file search can be performed more rapidly by using the high reading speed and random accessibility of a hard disk.
  • the auxiliary information of the hard disk 711 If the time and date of updation of the auxiliary information of the hard disk 711 is newer, the auxiliary information of the hard disk 711, and the management information on the tape 721 are read out to be shown to the user, and the user is inquired as to which information is used in the management of a file, or whether management information is to be newly generated or not.
  • the management information on the hard disk 711 is stored into the memory 718, and, if the user further selects that the management information on the tape 721 is to be overwritten by the auxiliary information of the hard disk 711, an overwriting operation is performed on the tape 721 by using the auxiliary information stored in the memory 718. If the user selects the management information on the tape 721, the management information on the tape 721 is read out to be stored into the memory 718, and, if the user further selects that the management information of the hard disk 711 is to be overwritten by the auxiliary information of the tape 721, an overwriting operation is performed on the hard disk 711 by using the auxiliary information stored in the memory 718.
  • the case where the time and date of updation of the auxiliary information of the hard disk 711 is newer than the MIC 2 is considered to occur in an occasion, for example, that, during a process of writing the management information and identification information into the MIC 2 or the tape 721, communication between the PC 710 and the recording/reproducing apparatus 701 is caused not to be normally conducted for some reason, or that, during a process of writing into the MIC 2, the recording/reproducing apparatus 701 is caused not to normally operate for some reason.
  • the management information on the tape 721 is read out to be stored into the memory 718. If the user further selects that the management information of the hard disk is to be overwritten by the auxiliary information of the tape 721, an overwriting operation is performed on the hard disk 711 by using the auxiliary information stored in the memory 718.
  • Files on the tape 721 are managed by using auxiliary information stored in the memory 718.
  • auxiliary information data are reproduced from the magnetic tape 721.
  • the reproduced data are sent to the data outputting means 706 and then output to the outside through the interface 5.
  • management information and auxiliary information on the cassette 3 (the tape 721), the hard disk 711, and the MIC 2 can be shared in the latest form.
  • the file management information acquiring means 708 or 715 fetches, for each file, information of the file on the tape 721 which is stored in the MIC 2 or the hard disk 721, that is, the name of the file, the time and date of recording on the tape, the size of the file, copyright information of the file, copy control information of the file, and the readout position of the file in the tape 21.
  • the file management information acquiring means 712 and 715 fetch data in which a volume, a partition, a directory, and a descriptor that are specified in 13346 are recorded.
  • identification information for distinguishing a tape and information relating to times and dates of the identification information, the contents of the tape, and management information are recorded in the MIC 2 which, in the prior art, is used for recording only management information of the tape 721 and the cassette 3, thereby enabling the record position of latest management information of each file to be recorded on the tape 721, to be judged.
  • the MIC 2 which, in the prior art, is used for recording only management information of the tape 721 and the cassette 3, thereby enabling the record position of latest management information of each file to be recorded on the tape 721, to be judged.
  • management information has the same contents, it is possible to read out management information from a medium of the highest access speed. Consequently, a file recorded on a tape can be rapidly accessed as compared with the prior art.
  • data which are identical with management information of files to be recorded on the tape 721 are recorded on the hard disk 711.
  • part of file management information which is to be recorded on the tape 721 may be recorded, or the format of management information to be recorded may be converted into another one.
  • part of file management information which is to be recorded on the tape may be recorded in the MIC 2, or the format of management information to be recorded may be converted into another one.
  • the judgment on fetch and selection of information may be performed by a combination of the CPU and the memory or programs on the hard disk.
  • the three kinds of file management information i.e., the file management information on the hard disk 711, the file management information on the tape 721, and the file management information in the MIC 2 are handled.
  • minimum management information which is required in the common user interface includes name information (may be omitted) relating to a drive, time and date information of latest updation, capacity information of the whole of the drive and information relating to a space region, directories in the drive, name information of files, time and date information of latest updation, and capacity information.
  • the three kinds of file management information i.e., the file management information on the hard disk 711, the file management information on the tape 721, and the file management information in the MIC 2 comprise at least the above-mentioned necessary management information but are arranged in different manners.
  • the MIC particularly, data are recorded with being packed as closely as possible in order to suppress the capacity required for recording management information to a minimum level.
  • auxiliary management information is provided in addition to the above-mentioned data. In this way, recording is conducted in different methods.
  • Fig. 18 shows a form of recording in an embodiment of the invention.
  • a CPU determines which one of three kinds of file management information is used, in the same manner as the first embodiment. Then, information relating to the record format of each management information is obtained.
  • recording is conducted in different methods so that, for example, management information is provided.
  • the CPU acquires, for example, D data which is information indicative of the time and data of updation from each management information, however, it is possible to obtain common information from the three media.
  • management information On the basis of obtained information relating to the record format, management information is read out, and then displayed on the user interface. The user sees the three kinds in the identical display format.
  • Fig. 19 is a block diagram of an embodiment of the invention, and Fig. 20 shows a form of transmitting data.
  • Various data processing apparatuses are connected to an IEEE 1394 bus 800.
  • 801 denotes a data recording/reproducing apparatus
  • 803 denotes a recording/reproducing circuit
  • 804 denotes a copy information separator
  • 805 denotes a record data processor
  • 806 denotes a typical-copy information generator
  • 807 denotes a packetizer
  • 808 denotes a copy information multiplier
  • 809 denotes a controller
  • 802 denotes an interface unit.
  • 811 denotes a transmitter/receiver
  • 812 denotes a copy information separator
  • 813 denotes a copy control information restorer
  • 814 denotes a sector restoration processor
  • 815 denotes a copy information multiplier.
  • the reference numeral 820 denotes a digital data disk serving as a data outputting apparatus
  • 821 denotes a reproducing unit
  • 822 denotes a decoding unit
  • 823 denotes an interface unit.
  • 824 denotes a transmitter/receiver
  • 830 denotes a copy information separator
  • 829 denotes a typical-copy information generator
  • 826 and 827 denote packetizers
  • 828 denotes a transmission data processor
  • 825 denotes a copy information multiplier.
  • the reproducing unit 825 reproduces digital data in the unit of a sector and sends the reproduced data in the sector form to the interface unit 823 and the decoding unit 822.
  • the decoding unit 822 separates and decodes the input data and then outputs to a display device, etc.
  • the copy information separator 830 separates copy information written at a specific position of a sector, from the data sent to the interface unit 823.
  • the transmission data processor 831 partitions data from which copy information is separated, into parts of the size of a transmission packet according to 1394, and the packetizer 827 adds a header of a predetermined format of IEEE 1394 to form a transmission packet.
  • the transmission data processor 828 performs processes such as an addition of a time stamp for defining the transmission timing.
  • the separated copy information is generally seemed to have the same value such as "copy once" within a certain range, for example, in one file.
  • typical copy information is generated by the typical-copy information management information generator 829.
  • copy information in continuous ranges is searched to detect a range of the same copy information, the range is handled as one file, and typical copy information of one file is similarly generated.
  • the generated typical copy information is converted into the format of a transmission packet by the packetizer 826.
  • the above-mentioned packets i.e., the packet of the typical copy information, and that of the input data from which copy information is separated are again multiplexed by the copy information multiplier 825, and then sent out to the bus by the transmitter/receiver 824.
  • data input to the interface unit 802 from the transmitter/receiver 811 are separated into a packet of typical copy information, and a data packet by the copy information separator 812.
  • the sector restoration processor 814 restores the format of the original sector from the data packet.
  • the copy control information restorer 813 restores copy information of each sector from the separated typical copy information, and the copy information multiplier 15 adds copy information to each sector.
  • the copy information separator 804 separates copy information written at a specific position of a sector.
  • the record data processor 805 converts the input data into a format in which the recording of the input data is enabled. Specifically, a sector with copy information and having a size of 2,064 Bytes is separated into plural parts as shown in Fig. 21, and the packetizer 807 adds a header to generate a record packet of 78 Bytes.
  • the record data processor 805 performs processes such as an addition of a time stamp for defining the reproduction timing. In accordance with requirement of increasing or decreasing the data rate, dummy data are inserted.
  • the separated copy information is generally seemed to have the same value such as "copy once" within a certain range, for example, in one file.
  • typical copy information is generated by the typical-copy information management information generator 6.
  • the copy information multiplier 808 disposes the generated typical copy information at a specific position on the recording medium, for example, in a region called an AUX region where information relating to files is to be recorded. With respect to the record packet of the input data from which copy information is separated, the position in a track is determined by the copy information multiplier 808. The record packet is recorded together with the typical copy information in the AUX region by the recording circuit 803.
  • the controller 809 manages the operation of the recording circuit, etc.
  • the typical copy information is separated and recorded.
  • copy information multiplexed for each sector is once removed away, and a typical value is generated to reduce the number, thereby enabling the recording capacity to be effectively used.
  • an IEEE 1394 bus is used as a digital data bus.
  • another bus may be used as far as it satisfies conditions such as the timing accuracy which are required in a digital video data transmission and the like.
  • the above-described data conversion method is an example. Even when the sector structure, and the structures of the record and transmission packets are configured in another manner, similar processing can be performed.
  • the means in the invention may be realized by software means with using a computer, or alternatively by using dedicated hardware circuits respectively having the functions of the means.
  • a medium such as a disk which stores programs for realizing the whole or part of the functions of the means in the invention is within a scope of the invention.
  • the invention by using characteristics that the position of a code word of a DC component indicating the starting position of each small block is fixed, and that, when an end-of-block code is added, a region from the added position to the starting position of the next small block becomes a data region which is ineffective for decoding and reproduction in a currently-used digital VTR, it is possible to record and reproduce a data file other than a video and audio signal of the predetermined format.
  • data on a recording medium are identical with transmission and record formats of the recording medium.
  • a data file portion is judged as an ineffective data region, and skipped by a reproducing/decoding device of a currently-used digital VTR deck. Therefore, the tape on which a data file is recorded can be seen also on a currently-used digital VTR deck without problems.
  • the function of a reproducing/decoding device of a currently-used digital VTR deck, and also the above-mentioned function are provided and switched over, thereby enabling both a tape on which a data file is recorded, and that on which recording is conducted by a currently-used digital VTR deck, to be seen without problems.
  • the recording apparatus which can record a video and audio signal of a predetermined format and a data file other than the signals
  • the kind of a data which is recorded at a reproduction position of a recording medium is indicated
  • switching is performed by a reproducing apparatus having functions of reproducing/decoding device of a currently-used digital VTR deck, and reproducing and reconstructing a data file, in accordance with the kind of a data which is recorded at a reproduction position of the recording medium, thereby enabling both a tape on which a data file is recorded, and that on which recording is conducted by a currently-used digital VTR deck, to be seen without problems.
  • the data file when the size of an input data file is not an integer multiple of the size of a region where the data recording is enabled, i.e., a data region which is ineffective for decoding and reproduction in a currently-used digital VTR, or when the input data rate is different from the recording rate of a currently-used deck in spite of conversion and recording conducted so as to maintain the real-timeness, the data file is recorded with adding ineffective dummy data. In a reproducing process, the data file can be reproduced while the added ineffective dummy data are removed away.
  • a region is set in the same manner as that for recording a data file, and file management information is recorded in data files and data of a currently-used deck to which a concept of a file is given.
  • file management information is recorded in data files and data of a currently-used deck to which a concept of a file is given.
  • a format which can be handled in the unit of a file and rapidly accessed can be supplied to a VCR of the prior art.
  • An MIC, a management information track, and management information on an HDD are always matched to one other unless writing is particularly performed on a tape by using another PC. At the timing when a tape is mounted, therefore, a file can be immediately accessed by using only management information on the HDD and without reading the management information track.
  • Typical copy information is separated and recorded. Copy information multiplexed for each sector is once removed away, and a typical value is generated to reduce the number, thereby enabling the recording capacity to be effectively used. During a process of reproduction, it is not required to judge copy information of each sector, and the judgement on whether copying is enabled or not can be performed by seeing only typical copy information. Therefore, no wasteful time is consumed in the judgment during a process of reproduction.
EP97924301A 1996-06-04 1997-06-03 Aufnahme- und wiedergabevorrichtung Withdrawn EP0903940A4 (de)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP14140396A JP3514038B2 (ja) 1996-06-04 1996-06-04 データ伝送方法とデータ記録方法
JP141403/96 1996-06-04
JP20337196A JPH1050031A (ja) 1996-08-01 1996-08-01 データ記録方法
JP203371/96 1996-08-01
JP208299/96 1996-08-07
JP8208299A JPH1049412A (ja) 1996-08-07 1996-08-07 データ記録方法
JP06765397A JP3293514B2 (ja) 1997-03-21 1997-03-21 記録再生装置
JP67653/97 1997-03-21
PCT/JP1997/001877 WO1997047133A1 (fr) 1996-06-04 1997-06-03 Dispositif d'enregistrement et de reproduction

Publications (2)

Publication Number Publication Date
EP0903940A1 true EP0903940A1 (de) 1999-03-24
EP0903940A4 EP0903940A4 (de) 2000-02-02

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EP (1) EP0903940A4 (de)
KR (1) KR20000016370A (de)
CN (1) CN1227693A (de)
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WO (1) WO1997047133A1 (de)

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KR20000016370A (ko) 2000-03-25
CN1227693A (zh) 1999-09-01

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